diff --git a/core/lib/Drupal/Core/Entity/Query/QueryBase.php b/core/lib/Drupal/Core/Entity/Query/QueryBase.php
index f5805b6..1a15bed 100644
--- a/core/lib/Drupal/Core/Entity/Query/QueryBase.php
+++ b/core/lib/Drupal/Core/Entity/Query/QueryBase.php
@@ -295,6 +295,11 @@ protected function initializePager() {
     global $pager_page_array;
 
     if ($this->pager && !empty($this->pager['limit']) && !$this->count) {
+      // Calculate the total number of results through a count query, to set
+      // the pager total. Then initialize the pager with the information at
+      // hand (total number of results, results per page, pager element id).
+      // The current page is available and validated from $pager_page_array
+      // after initialization.
       $count_query = clone $this;
       $this->pager['total'] = $count_query->count()->execute();
       pager_default_initialize($this->pager['total'], $this->pager['limit'], $this->pager['element']);
diff --git a/core/modules/system/src/Tests/Pager/PagerTest.php b/core/modules/system/src/Tests/Pager/PagerTest.php
index 0de500b..06e5253 100644
--- a/core/modules/system/src/Tests/Pager/PagerTest.php
+++ b/core/modules/system/src/Tests/Pager/PagerTest.php
@@ -201,8 +201,8 @@ public function testEntityQueryPager() {
 
     // Try getting a page above the range, should render the last one.
     $this->drupalGet('pager-test/entity-query-pager', ['query' => ['page' => 200]]);
+    $this->assertNoText("There are no node ids found in the db");
     $this->assertPagerItems(4);
-
   }
 
   /**